/**
* overlay_phandle_add_offset - Increases a phandle by an offset
* @fdt: Base device tree blob
* @node: Device tree overlay blob
* @name: Name of the property to modify (phandle or linux,phandle)
* @delta: offset to apply
*
* overlay_phandle_add_offset() increments a node phandle by a given
* offset.
*
* returns:
* 0 on success.
* Negative error code on error
*/
static int overlay_phandle_add_offset(void *fdt, int node,
const char *name, uint32_t delta)
{
const fdt32_t *val;
uint32_t adj_val;
int len;
val = fdt_getprop(fdt, node, name, &len);
if (!val)
return len;
if (len != sizeof(*val))
return -FDT_ERR_BADPHANDLE;
adj_val = fdt32_to_cpu(*val);
if ((adj_val + delta) < adj_val)
return -FDT_ERR_NOPHANDLES;
adj_val += delta;
if (adj_val == (uint32_t)-1)
return -FDT_ERR_NOPHANDLES;
return fdt_setprop_inplace_u32(fdt, node, name, adj_val);
}
/**
* Modify the device tree to remove all unused interface types.
*/
int board_fixup_fdt(void)
{
const char *fdt_key;
int val;
int rc;
val = pca953x_get_val(0, 0x20);
if (val & 4)
fdt_key = "2,sata";
else
fdt_key = "2,pcie";
octeon_fdt_patch(working_fdt, fdt_key, NULL);
if (val & 1)
fdt_key = "0,xaui";
else
fdt_key = "0,qsgmii";
debug("%s: Patching DLM 0 for %s\n", __func__, fdt_key);
octeon_fdt_patch(working_fdt, fdt_key, NULL);
if (val & 8) {
debug("PCM mode detected, disabling SPI NOR\n");
octeon_fdt_patch(working_fdt, "0,pcm", "cavium,pcm-trim");
} else {
debug("SPI NOR mode selected\n");
octeon_fdt_patch(working_fdt, "0,not-pcm", "cavium,pcm-trim");
}
/* Check if we need to swap the MMC slots or not. */
if (val & 0x10) {
int s0_offset, s1_offset, offset;
debug("%s: Swapping mmc slots 0 and 1\n", __func__);
/* Swap slot 0 and slot 1 in device tree */
offset = fdt_path_offset(gd->fdt_blob, "/soc/mmc");
if (offset < 0) {
puts("Error accessing /soc/mmc in device tree\n");
return -1;
}
s0_offset = fdt_subnode_offset(gd->fdt_blob, offset,
"mmc-slot@0");
s1_offset = fdt_subnode_offset(gd->fdt_blob, offset,
"mmc-slot@1");
debug(" slot 0 offset: %d, slot 1 offset: %d\n",
s0_offset, s1_offset);
if (s0_offset < 0 || s1_offset < 0) {
puts("Error accessing MMC in device tree\n");
return -1;
}
rc = fdt_setprop_inplace_u32(gd->fdt_blob, s0_offset, "reg", 1);
rc |= fdt_setprop_inplace_u32(gd->fdt_blob, s1_offset, "reg", 0);
if (rc) {
puts("Error changing reg property in mmc slot\n");
return -1;
}
rc = fdt_set_name(gd->fdt_blob, s0_offset, "mmc-slot@1");
rc |= fdt_set_name(gd->fdt_blob, s1_offset, "mmc-slot@0");
if (rc) {
puts("Error renaming MMC slot names\n");
return -1;
}
}
return 0;
}
